The paper presents an advanced parametric method of blade stacking lines in terms of sweep and lean based on controlled curvature. To the knowledge of the authors, there is no related approach reported in open literature that uses Bezier spline as the radial curvature distribution to improve the smoothness of the blade surface; most previous studies ignored the discontinuous slopes of curvature of the parametric curves. The parametric method called curvature-controlled stacking-line method (CCSLM) is performed by changing the magnitude of the sweep or lean. A fourth Bezier spline is adopted to define the curvature of spanwise stacking line directly ensuring surface smoothness. Then, the redesign cascades are created by sectional profiles stacked along the radial stacking lines which are obtained by twice integrating the Bezier spline. Then, the advanced method is conducted to optimize a high-subsonic controlled diffusion airfoil at design point, where the blade shape is generated in terms of lean. A single-objective optimization is performed using Kriging model and genetic algorithm to optimize total pressure loss, and the optimized geometry is obtained. The optimization results show that the blade design CCSLM has significant effects on the endwall flow vortex as well as radial loading distribution. The reduction of total pressure loss and secondary flow is also observed, and the aerodynamic performance is well improved compared with the original cascade.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    A new curvature-controlled stacking-line method for optimization design of compressor cascade considering surface smoothness


    Contributors:


    Publication date :

    2020-04-01


    Size :

    14 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Optimization Design of Compressor Cascade with Swept and Curved Blades

    Zhao, Guijie / Chen, Fu / Song, Yanping et al. | AIAA | 2005


    Design and Optimization of the Tandem Arranged Cascade in a Transonic Compressor

    Wang, Haitong / Wang, Yangang / Wei, Lai | AIAA | 2017


    Measuring wing-surface smoothness

    Arbon, E.R. / Blyth, R.H. / Daniels, L.C.M. | Engineering Index Backfile | 1949